0000001 - Document - Cover page link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated income statement link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated income statement - Alternative calculation link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated statement of comprehensive income link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated statement of comprehensive income - Alternative calculation link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated statement of comprehensive income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated cash flow statement link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated cash flow statement (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952158 - Statement - Consolidated balance sheet link:presentationLink link:calculationLink link:definitionLink 9952159 - Statement - Consolidated balance sheet (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952160 - Statement - Consolidated statement of changes in equity link:presentationLink link:calculationLink link:definitionLink 9952161 - Statement - Consolidated statement of changes in equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Basis of preparation link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Changes in accounting policies link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Segmental information link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Segmental information - additional information link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Impairment link:presentationLink link:calculationLink link:definitionLink 9952167 - 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Disclosure - Acquisition and disposals - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - Acquisition and disposals - Identifiable assets acquired and liabilities assumed and analysis of cash flows on acquisition (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - Acquisition and disposals - Impact of acquisition on net debt (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Cash and cash equivalents (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Close-down, restoration and environmental provisions (Detail) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Financial instruments - Summary of fair value of financial instruments (Detail) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Financial instruments - Summary of changes in fair value of Level 3 financial assets and financial liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Financial instruments - Additional information (Detail) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Financial instruments - Carrying amounts and fair values (Detail) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Commitments and contingencies (Details) link:presentationLink link:calculationLink link:definitionLink